You can check your National Insurance record online to see:
You need a Government Gateway user ID and password to check your National Insurance record. If you do not have a user ID, you can create one when you check your record.
Signing in to the ‘Check your National Insurance record’ service activates your personal tax account. You can use this to check your HMRC records and manage your other details.
You can request a printed National Insurance statement:
You will need to say which years you want your statement to cover. You cannot request statements for the current or previous tax year.
You can also write to HM Revenue and Customs (HMRC).
National Insurance contributions and Employers Office
HM Revenue and Customs
BX9 1AN